FieldServer FS-8700-21 用户手册
FS-8700-21 LonWorks Manual
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6.2.3 Driver Related Map Descriptor Parameters
Column Title
Function
Legal Values
Node_Name
Name of Node to fetch data from or send data to. Needed for Explicit
Addressing.
Addressing.
One of the node names
specified in “Client Node
Descriptors” above
specified in “Client Node
Descriptors” above
SNVT_Index
Server Network Variable Index
0-4095
SNVT_Type
Standard network variable type of the data
See Appendix D
SNVT_Option*
Specifies which record out of a complex SNVT we are after.
See Appendix A.9.1
SNVT_Units*
Specifies the measurement units if something other than Metric is
required
required
See Appendix A.9.2
UNVT_Byte_Length*
Specifies the length in bytes of an UNVT. This Parameter is compulsory
when SNVT_Type is set to UNVT, the parameter is not used on
conjunction with SNVT’s
when SNVT_Type is set to UNVT, the parameter is not used on
conjunction with SNVT’s
1-255. See Appendix A.1
UNVT_ID
Specifies the Type Number to apply to this particular UNVT. This
Parameter is optional when SNVT_Type is set to UNVT, The parameter
is not used on conjunction with SNVT’s
Parameter is optional when SNVT_Type is set to UNVT, The parameter
is not used on conjunction with SNVT’s
0, 146-255. See Appendix
A.1.
A.1.
NV_Min_Value*
Network Variable updates with values less than specified in this field
will be ignored.
will be ignored.
See Appendix A.2
NV_Max_Value*
Network Variable updates with values higher than specified in this field
will be ignored.
will be ignored.
See Appendix A.2
NV_Delta_Value*
Network Variable updates where the value’s delta change is less than
specified in this field will be ignored unless the Max_Scan_Time
Condition has been met. Compulsory for Throttling Lon Functions only.
Not used on other Lon Functions.
specified in this field will be ignored unless the Max_Scan_Time
Condition has been met. Compulsory for Throttling Lon Functions only.
Not used on other Lon Functions.
See Appendix A.2
NV_Selfdoc_Text*
The Self-Documenting String for this Network Variable.
Normal Text up to a
length of 40 characters
length of 40 characters
6.2.4 Timing Parameters
Column Title
Function
Legal Values
Scan_Interval*
Seconds per scan
0-32000,
2s
2s
Min_Scan_Time*
Minimum Scan Time in seconds. Compulsory for Throttling Lon Functions only. Not
used on other Lon Functions.
used on other Lon Functions.
See Appendix
A.3
A.3
Max_Scan_Time*
Maximum Scan Time in seconds. Compulsory for Throttling Lon Functions only. Not
used on other Lon Functions.
used on other Lon Functions.
See Appendix
A.3
A.3